CVE-2021-3631

Publication date 2 March 2022

Last updated 24 July 2024

Ubuntu priority

Negligible

Why this priority?

Cvss 3 Severity Score

6.3 · Medium

Score breakdown

A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.

Status

Package Ubuntu Release Status
libvirt 24.10 oracular
Fixed 7.6.0-0ubuntu3
24.04 LTS noble
Fixed 7.6.0-0ubuntu3
23.10 mantic
Fixed 7.6.0-0ubuntu3
23.04 lunar
Fixed 7.6.0-0ubuntu3
22.10 kinetic
Fixed 7.6.0-0ubuntu3
22.04 LTS jammy
Fixed 7.6.0-0ubuntu3
21.10 impish
Not affected
21.04 hirsute Ignored end of life
20.10 groovy Ignored end of life
20.04 LTS focal
Fixed 6.0.0-0ubuntu8.16
18.04 LTS bionic
Fixed 4.0.0-1ubuntu8.21
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty Ignored end of ESM support, was needs-triage

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libvirt

Severity score breakdown

Parameter Value
Base score 6.3 · Medium
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

References

Related Ubuntu Security Notices (USN)

Other references